Probing in-mouth texture perception with a biomimetic tongue

Journal of the Royal Society Interface - Tập 16 Số 159 - Trang 20190362 - 2019
Jean-Baptiste Thomazo1,2, Javier Contreras Pastenes2, Christopher J. Pipe3, Benjamin Le Révérend3, Élie Wandersman2, Alexis Prevost2
1Nestlé Dairy Center, Rue d'Orival, 14100 Lisieux, France
2Sorbonne Université, Centre National de la Recherche Scientifique, Laboratoire Jean Perrin, LJP, 75005 Paris, France
3Nestlé Research Center, Route du Jorat, 1000 Lausanne, Switzerland

Tóm tắt

An experimental biomimetic tongue–palate system has been developed to probe human in-mouth texture perception. Model tongues are made from soft elastomers patterned with fibrillar structures analogous to human filiform papillae. The palate is represented by a rigid flat plate parallel to the plane of the tongue. To probe the behaviour under physiological flow conditions, deflections of model papillae are measured using a novel fluorescent imaging technique enabling sub-micrometre resolution of the displacements. Using optically transparent Newtonian liquids under steady shear flow, we show that deformations of the papillae allow their viscosity to be determined from 1 Pa s down to the viscosity of water (1 mPa s), in full quantitative agreement with a previously proposed model (Lauga et al. 2016 Front. Phys. 4 , 35 ( doi:10.3389/fphy.2016.00035 )). The technique is further validated for a shear-thinning and optically opaque dairy system.

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Journal of the Royal Society Interface

Tập 16 Số 159

20190362

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